Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Bemerkung Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Zugriffsart Link Abteilungen OPUS4-6982 Konferenzveröffentlichung Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Mirza, M. F., ; Schorn, Christian, schorn@sij.fh-aachen.de; Schwarzer, Klemens, schwarzer@sij.fh-aachen.de; Wedding, Philipp, wedding@sij.fh-aachen.de; Weis, Fabian, weis@sij.fh-aachen.de Parabolrinnenentwicklung und Qualifizierung am Solar-Institut Jülich Regensburg OTTI 2014 1 Thermische Solarenergie : 24. Symposium ; 7. bis 9. Mai 2014, Kloster Banz, Bad Staffelstein 978-3-943891-35-5 242 243 Solar-Institut Jülich OPUS4-7078 Konferenzveröffentlichung Janotte, N., ; Feckler, G., ; Kötter, Jens, ; Decker, Stefan, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Schmitz, Mark, ; Lüpfert, E., Dynamic performance evaluation of the HelioTrough® collector demonstration loop : towards a new benchmark in parabolic trough qualification Red Hook, NY Curran 2014 8 SolarPACES International Conference 2013, Las Vegas, Nevada, USA, 17 - 20 September 2013 : [proceedings]. - Pt. 1. - (Energy procedia ; 49) 978-1-63266-904-9 Nebent.: Power and Chemical Energy Systems concentrating solar power 109 117 10.1016/j.egypro.2014.03.012 Solar-Institut Jülich OPUS4-7079 Konferenzveröffentlichung Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Vorbrugg, O., ; Nava, P., Construction and Commissioning Process of the Andasol Solar Field Stuttgart Deutsches Zentrum für Luft- u. Raumfahrt 2009 1 CD-ROM SolarPACES 2009 : electricity, fuels and clean water powered by the sun ; 15 - 18 September 2009, Berlin, Germany ; the 15th SolarPACES conference ; proceedings 978-3-00-028755-8 Solar-Institut Jülich OPUS4-7080 Konferenzveröffentlichung Schulte-Fischedick, Jan, ; Tamme, Rainer, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de CFD Analysis of the Cool Down Behaviour of Molten Salt Thermal Storage Systems New York, NY ASME 2009 9 ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences, ASME 2008 2nd International Conference on Energy Sustainability, Jacksonville, Florida, USA, August 10–14, 2008. - Vol. 2 978-0-7918-4320-8 Paper No. ES2008-54101 515 524 doi:10.1115/ES2008-54101 Solar-Institut Jülich OPUS4-7092 Wissenschaftlicher Artikel Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Lippke, F., The influence of transients on the design of DSG solar fields 1999 5 Journal de Physique IV : proceedings 9 2-86883-402-7 PR3 489 494 10.1051/jp4:1999377 Solar-Institut Jülich OPUS4-7093 Konferenzveröffentlichung Hahne, E., ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Rheinländer, J., Girot, Michel The Effect of Tilt on Flow Pattern of Water/Steam Flow Through Heated Tubes Pisa Ed. ETS 1997 9 Experimental heat transfer, fluid mechanics and thermodynamics 1997 : proceedings of the 4th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Brussels, June 2 - 6, 1997. - Vol. 2 88-467-0014-7 925 934 Solar-Institut Jülich OPUS4-7094 Wissenschaftlicher Artikel Goebel, O., ; Geskes, P., ; Geyer, Michael, ; Henneke, K., ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Direkte Dampferzeugung in Parabolrinnen-Solarkraftwerken Köln Forschungsverb Sonnenenergie 1997 6 Strom aus Sonne und Wind. - (Themen / Forschungsverbund Sonnenenergie ; 96/97) 110 116 OPUS4-7095 Konferenzveröffentlichung Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Rheinländer, J., ; Lippke, F., Becker, Manfred Solar Fields for Direct Steam Generation in Parabolic Trough Collectors Heidelberg Müller 1997 19 Components, tools, facilities and measurement techniques. - (Solar thermal concentrating technologies : proceedings of the 8th international symposium, October, 6 - 11, 1996, Köln, Germany ; Vol. 2) 3-7880-7616-X 815 834 Solar-Institut Jülich OPUS4-7096 Konferenzveröffentlichung Ajona, J. I., ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Sperduto, F., ; Farinha-Mendes, J., Becker, Manfred Main Achievements within ARDISS (Advanced Receiver for Direct Solar Steam Production in Parabolic Trough Solar Power Plants) Project Heidelberg Müller 1996 21 Components, tools, facilities and measurement techniques. - (Solar thermal concentrating technologies : proceedings of the 8th international symposium, October, 6 - 11, 1996, Köln, Germany ; Vol. 2) 3-7880-7616-X 733 754 OPUS4-7117 Konferenzveröffentlichung Aringhoff, R., ; Geyer, Michael, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Kistner, Rainer, ; Nava, P., ; Osuna, R., Steinfeld, Aldo AndaSol : 50MW Solar Plants with 9 Hour Storage for Southern Spain Villingen Paul Scherrer Inst. 2002 5 Proceedings of the 11th SolarPACES International Symposium on Concentrated Solar Power and Chemical Energy Technologies : September 4 - 6, 2002, Zurich, Switzerland / Paul Scherrer Institut, PSI; ETH, Eidgenössische Technische Hochschule Zürich 3-9521409-3-7 37 42 Solar-Institut Jülich OPUS4-7118 Konferenzveröffentlichung Dersch, Jürgen, ; Geyer, Michael, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Jones, Scott A., ; Kelly, Bruce, ; Kistner, Rainer, ; Ortmanns, Winfried, ; Pitz-Paal, Robert, ; Price, Henry, Steinfeld, Aldo Trough integration into power plants : a study on the performance and economy of integrated solar combined cycle systems Villingen Paul Scherrer Inst. 2002 10 Proceedings of the 11th SolarPACES International Symposium on Concentrated Solar Power and Chemical Energy Technologies : September 4 - 6, 2002, Zurich, Switzerland / Paul Scherrer Institut, PSI; ETH, Eidgenössische Technische Hochschule Zürich 3-9521409-3-7 661 671 Solar-Institut Jülich OPUS4-7122 Konferenzveröffentlichung Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Kelly, Bruce, ; Price, Henry, Steinfeld, Aldo Two Tank Molten Salt Storage for Parabolic Trough Solar Power Plants Villingen Paul Scherrer Inst. 2002 7 Proceedings of the 11th SolarPACES International Symposium on Concentrated Solar Power and Chemical Energy Technologies : September 4 - 6, 2002, Zurich, Switzerland / Paul Scherrer Institut, PSI; ETH, Eidgenössische Technische Hochschule Zürich 3-9521409-3-7 517 524 Solar-Institut Jülich OPUS4-7123 Konferenzveröffentlichung Blake, D., ; Moens, L., ; Hale, M.-J., ; Price, Henry, ; Keaney, David W., ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Steinfeld, Aldo New heat transfer and storage fluids for parabolic trough solar thermal electric plants Villingen Paul Scherrer Inst. 2002 3 Proceedings of the 11th SolarPACES International Symposium on Concentrated Solar Power and Chemical Energy Technologies : September 4 - 6, 2002, Zurich, Switzerland / Paul Scherrer Institut, PSI; ETH, Eidgenössische Technische Hochschule Zürich 3-9521409-3-7 63 66 OPUS4-7124 Konferenzveröffentlichung Kötter, Jens, ; Decker, Stefan, ; Detzler, Raphael, ; Schäfer, Jochen, ; Schmitz, Mark, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Cost Reduction of Solar Fields with HelioTrough Collector Köln FLAGSOL 2012 9 S. : Ill., graph. Darst. Concentration Solar Power and Chemical Energy Systemes : SolarPaces 2012, September 11 14 2002, Marrakesh, Morroco weltweit http://www.heliotrough.com/doc/SolarPaces2012_Heliotrough.pdf OPUS4-7125 Konferenzveröffentlichung Dersch, Jürgen, ; Geyer, Michael, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Jones, Scott A., ; Kelly, Bruce, ; Kistner, Rainer, ; Ortmanns, Winfried, ; Pitz-Paal, Robert, ; Price, Henry, Pearson, J. Boise Solar Trough Integration Into Combined Cycle Systems ASME 2002 8 Solar engineering 2002 : proceedings of the International Solar Energy Conference ; presented at the 2002 International Solar Energy Conference, a part of Solar 2002 - Sunrise on the Reliable Energy Economy, June 15 - 20, 2002, Reno, Nevada 0-7918-1689-3 351 359 doi:10.1115/SED2002-1072 Solar-Institut Jülich OPUS4-7081 Wissenschaftlicher Artikel Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Kearney, David W., Survey of Thermal Energy Storage for Parabolic Trough Power Plants 2002 7 Journal of Solar Energy Engineering 124 2 145 152 10.1115/1.1467601 Solar-Institut Jülich OPUS4-7082 Wissenschaftlicher Artikel Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Nava, P., Die Strahlung der Sonne einfangen 2005 3 DLR-Nachrichten / Deutsches Zentrum für Luft- und Raumfahrt 109 Sonderheft Solarforschung 34 37 weltweit http://www.dlr.de/Portaldata/1/Resources/kommunikation/publikationen/109_nachrichten/dlr-nari109_34-37.pdf Solar-Institut Jülich OPUS4-7083 Wissenschaftlicher Artikel Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Kelly, Bruce, ; Price, Henry, Two Tank Molten Salt Storage for Parabolic Trough Solar Power Plants 2002 10 Energy : the international journal 29 SolarPACES 2002, Zürich, Switzerland, 4-6 September 2002 5-6 (Special Issue SolarPaces) 883 893 10.1016/S0360-5442(03)00193-2 Solar-Institut Jülich OPUS4-7084 Wissenschaftlicher Artikel Kearney, David W., ; Kelly, Bruce, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Cable, R., ; Pacheco, J., ; Mahoney, R., ; Price, Henry, ; Blake, D., ; Nava, P., ; Potrovitza, N., Engineering Aspects of a Molten Salt Heat Transfer Fluid in a Trough Solar Field 2002 9 Energy : the international journal 29 SolarPACES 2002, Zürich, Switzerland, 4-6 September 2002 5-6 (Special Issue SolarPaces) 861 870 10.1016/S0360-5442(03)00191-9 Solar-Institut Jülich OPUS4-7085 Wissenschaftlicher Artikel Dersch, Jürgen, ; Geyer, Michael, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Jones, Scott A., ; Kelly, Bruce, ; Kistner, Rainer, ; Ortmanns, Winfried, ; Pitz-Paal, Robert, ; Price, Henry, Trough integration into power plants—a study on the performance and economy of integrated solar combined cycle systems 2004 12 Energy : the international journal 29 SolarPACES 2002, Zürich, Switzerland, 4-6 September 2002 5-6 (Special Issue SolarPaces) 947 959 10.1016/S0360-5442(03)00199-3 Solar-Institut Jülich OPUS4-7086 Konferenzveröffentlichung Kelly, Bruce, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Hale, M.-J., Optimization Studies for Integrated Solar Combined Cycle Systems New York, NY ASME 2001 5 Solar engineering 2001 : proceedings of the International Solar Energy Conference ; presented at the 2001 International Solar Energy Conference, a part of Forum 2001 - Solar energy: the power to choose, April 21 - 25, 2001, Washington, D.C. 0-7918-1670-2 International Solar Energy Conference 393 398 Solar-Institut Jülich OPUS4-7108 Konferenzveröffentlichung Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Worringer, S., ; Graeter, F., ; Nava, P., Romero, Manuel Three Years of Operation Experience of the SKAL-ET Collector Loop at SEGS V [s.l.] SolarPACES [u.a.] 2006 1 CD-ROM 13th International Symposium Concentrated Solar Power and Chemical Energy Technologies, June 20 - 23, 2006, Seville, Spain 84-7834-519-1 Solar-Institut Jülich OPUS4-7114 Konferenzveröffentlichung Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Graeter, F., ; Nava, P., Ramos, C. Performance of the SKAL-ET Collector Loop at KJC Operating Company [s.l.] Instituto de Investigaciones Electricas 2004 12th International Symposium Solar Power and Chemical Energy Systems, October 6-8, 2004, Oaxaca Mexico ; SolarPACES International Symposium, 12 968-6114-18-1 Bd. nur beim DLR. Daher keine Seitenzahlenermittlung. Solar-Institut Jülich OPUS4-7115 Konferenzveröffentlichung Lüpfert, E., ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Price, Henry, ; Zarza, E., ; Kistener, R., Ramos, C. Towards Standard Performance Analysis for Parabolic Trough Collector Fields [s.l.] Instituto de Investigaciones Electricas 2004 12th International Symposium Solar Power and Chemical Energy Systems, October 6-8, 2004, Oaxaca Mexico ; SolarPACES International Symposium, 12 968-6114-18-1 Bd. nur beim DLR. Daher keine Seitenzahlenermittlung. Solar-Institut Jülich OPUS4-7116 Dissertation Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Untersuchungen zur Rohrwandbenetzung bei der Dampferzeugung in horizontalen und geneigten Parabolrinnen-Solarkollektoren. - (FLAGSOL Forschungsbericht) Köln FLAGSOL 2004 IX, 145 S. : Ill., graph. Darst. 3-9804901-2-2 Zugl.: Aachen, Techn. Hochsch., Diss., 2004 Solar-Institut Jülich OPUS4-7972 Wissenschaftlicher Artikel Damm, Marc André, damm@sij.fh-aachen.de; Sauerborn, Markus, sauerborn@sij.fh-aachen.de; Fend, Thomas, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Optimisation of a urea selective catalytic reduction system with a coated ceramic mixing element Baden-Baden Göller 2017 5 Journal of ceramic science and technology 8 2190-9385 (Print) 1 19 24 10.4416/JCST2016-00056 weltweit http://dx.doi.org/10.4416/JCST2016-00056 Solar-Institut Jülich OPUS4-10767 Konferenzveröffentlichung Duran Paredes, Ludwin, ; Mottaghy, Darius, Mottaghy@fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Groß, Rolf Fritz, r.gross@fh-aachen.de Online ground temperature and soil moisture monitoring of a shallow geothermal system with non-conventional components We present first results from a newly developed monitoring station for a closed loop geothermal heat pump test installation at our campus, consisting of helix coils and plate heat exchangers, as well as an ice-store system. There are more than 40 temperature sensors and several soil moisture content sensors distributed around the system, allowing a detailed monitoring under different operating conditions.In the view of the modern development of renewable energies along with the newly concepts known as Internet of Things and Industry 4.0 (high-tech strategy from the German government), we created a user-friendly web application, which will connect the things (sensors) with the open network (www). Besides other advantages, this allows a continuous remote monitoring of the data from the numerous sensors at an arbitrary sampling rate.Based on the recorded data, we will also present first results from numerical simulations, taking into account all relevant heat transport processes.The aim is to improve the understanding of these processes and their influence on the thermal behavior of shallow geothermal systems in the unsaturated zone. This will in turn facilitate the prediction of the performance of these systems and therefore yield an improvement in their dimensioning when designing a specific shallow geothermal installation. 2020 EGU General Assembly 2020 Online 4-8 May 2020 [Session ERE2.8] EGU2020-19052 weltweit https://doi.org/10.5194/egusphere-egu2020-19052 Fachbereich Bauingenieurwesen OPUS4-8765 Konferenzveröffentlichung Schorn, Christian, schorn@sij.fh-aachen.de; Weis, Fabian, weis@sij.fh-aachen.de; Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Schwarzer, Klemens, schwarzer@sij.fh-aachen.de; Schmitz, Mark, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Entwicklung und Bewertung eines Parabolrinnenkollektors zur Prozesswärmebereitstellung 2016 12 26. Symposium Thermische Solarenergie, 20.-22.04.2016 in Bad Staffelstein 26. OTTI Symposium Thermische Solarenergie 1 13 https://www.researchgate.net/publication/330702906 Solar-Institut Jülich OPUS4-9088 Wissenschaftlicher Artikel Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Schwarzenbart, Marc, ; Dittmann-Gabriel, Sören, soeren.dittmann@sij.fh-aachen.de Speicher statt Kohle. Integration thermischer Stromspeicher in vorhandene Kraftwerksstandorte Düsseldorf Springer-VDI-Verl. 2019 3 BWK : Das Energie-Fachmagazin 71 4 42 45 bezahl Fachbereich Energietechnik OPUS4-9652 Wissenschaftlicher Artikel Meyer, S., ; Hänel, Matthias, ; Beeh, B., ; Dittmann-Gabriel, Sören, ; Dluhosch, R., ; May, Martin, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; [und 5 weitere], , Multifunktionaler thermischer Stromspeicher für die Strom- und Wärmeversorgung der Industrie von morgen 2020 3 ETG Journal / Energietechnische Gesellschaft im VDE (ETG) 2020 1 6 9 Solar-Institut Jülich OPUS4-9654 Wissenschaftlicher Artikel Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Schwarzenbart, Marc, ; Dittmann-Gabriel, Sören, ; May, Martin, Hochtemperatur-Wärmespeicher für die Strom- und Wärmewende 2019 5 Solarzeitalter : Politik, Kultur und Ökonomie erneuerbarer Energien 31 2 18 23 Solar-Institut Jülich OPUS4-10207 Teil eines Buches Hebel, Christoph, hebel@fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Ritz, Thomas, prorektor2@fh-aachen.de; Röth, Thilo, roeth@fh-aachen.de; Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Böker, Jörg, j.boeker@fh-aachen.de; Franzke, Till, franzke@fh-aachen.de; Grodzki, Thomas, grodzki@fh-aachen.de; Merkens, Torsten, merkens@fh-aachen.de; Schöttler, Mirjam, schoettler@sij.fh-aachen.de FlexSHARE - Methodisches Framework zur innovativen Gestaltung der urbanen Mobilität durch Sharing- Angebote Das Ziel des INTERREG-Projektes „SHAREuregio" (FKZ: 34.EFRE-0300134) ist es, grenzüberschreitende Mobilität in der Euregio Rhein-Maas-Nord zu ermöglichen und zu fördern. Dazu soll ein elektromobiles Car- und Bikesharing- System entwickelt und in der Stadt Mönchengladbach, im Kreis Viersen sowie in den Gemeinden Roermond und Venlo (beide NL) zusammen mit den Partnern Wirtschaftsförderung Mönchengladbach, Wirtschaftsförderung für den Kreis Viersen, NEW AG, Goodmoovs (NL), Greenflux (NL) und der FH Aachen implementiert werden. Zunächst richtet sich das Angebot, bestehend aus 40 Elektroautos und 40 Elektrofahrrädern, an Unternehmen und wird nach einer Erprobungsphase, mit einer größeren Anzahl an Fahrzeugen, auch für Privatpersonen verfügbar gemacht werden. Die Fahrzeuge stehen bei den jeweiligen Anwendungspartnern in Deutschland und den Niederlanden. Im Rahmen dieses Projektes hat die FH Aachen „FlexSHARE" entwickelt - ein methodisches Framework zur innovativen Gestaltung urbaner Sharing- Angebote. Das Framework ermöglicht es, anhand von messbaren Kenngrößen, bedarfsgerechte und auf die Region abgestimmte Sharing-Systeme zu entwickeln. Wiesbaden Springer Gabler 2022 16 Transforming Mobility – What Next? 978-3-658-36429-8 Tagungsband zum 13. Wissenschaftsforum Mobilität, Beiträge des Wissenschaftsforums 153 169 10.1007/978-3-658-36430-4_10 campus https://doi.org/10.1007/978-3-658-36430-4_10 Fachbereich Bauingenieurwesen OPUS4-8744 Wissenschaftlicher Artikel Kearney, D., ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Nava, P., ; Kelly, B., ; Mahoney, R., ; Pacheco, J., ; Cable, R., ; Potrovitza, N., ; Blake, D., ; Price, H., Assessment of a Molten Salt Heat Transfer Fluid in a Parabolic Trough Solar Field 2003 6 Journal of Solar Energy Engineering 125 2 170 176 10.1115/1.1565087 bezahl http://doi.org/10.1115/1.1565087 Solar-Institut Jülich OPUS4-8746 Konferenzveröffentlichung Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Schorn, Christian, schorn@sij.fh-aachen.de; Schwarzer, Klemens, schwarzer@sij.fh-aachen.de; Wedding, Philipp, wedding@sij.fh-aachen.de; Weis, Fabian, weis@sij.fh-aachen.de Development and Testing of a Novel Method for the Determination of the Efficiency of Concentrating Solar Thermal Collectors 2015 9 Seiten Conference Proceedings Solar World Congress 2015, Daegu, Korea, 08 – 12 November 2015 weltweit http://proceedings.ises.org/paper/swc2015/swc2015-0114-Schorn.pdf Solar-Institut Jülich OPUS4-8747 Bericht Weis, Fabian, weis@sij.fh-aachen.de; Schorn, Christian, schorn@sij.fh-aachen.de; Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Entwicklung eines kleinen Parabolrinnenkollektors mit Kunststoffkorpus zur Bereitstellung solarer Prozesswärme : Poly-P : Abschlussbericht Jülich Solar-Institut Jülich 2016 56 Seiten https://doi.org/10.2314/GBV:871678195 Solar-Institut Jülich OPUS4-8750 Konferenzveröffentlichung Sauerborn, Markus, sauerborn@sij.fh-aachen.de; Liebenstund, Lena, ; Raue, Markus, raue@fh-aachen.de; Mang, Thomas, mang@fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Dueing, Andreas, Analytic method for material aging and quality analyzing to forecast long time stability of plastic micro heliostat components 2017 NaN AIP Conference Proceedings 1850 1 030045-1 030045-8 10.1063/1.4984388 weltweit https://doi.org/10.1063/1.4984388 Institut fuer Angewandte Polymerchemie OPUS4-8751 Teil eines Buches Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Kearney, D., ; Röger, M., ; Prahl, C., System performance measurements This chapter introduces performance and acceptance testing and describes state-of-the-art tools, methods, and instruments to assess the plant performance or realize plant acceptance testing. The status of the development of standards for performance assessment is given. Duxford Woodhead Publishing 2017 50 The Performance of Concentrated Solar Power (CSP) Systems : Modelling, Measurement and Assessment 978-0-08-100448-7 115 165 https://doi.org/10.1016/B978-0-08-100447-0.00005-5 campus https://doi.org/10.1016/B978-0-08-100447-0.00005-5 Solar-Institut Jülich OPUS4-8753 Konferenzveröffentlichung Anthrakidis, Anette, anthrakidis@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Schorn, Christian, schorn@sij.fh-aachen.de; Schwarzer, Klemens, schwarzer@sij.fh-aachen.de; Wedding, Philipp, wedding@sij.fh-aachen.de Weiterentwicklung und Erprobung eines neuartigen Verfahrens zur Bestimmung der Effizienz von konzentrierenden solarthermischen Kollektoren 2015 15 Seiten 25. OTTI Symposium Thermische Solarenergie https://www.researchgate.net/publication/330703226 Solar-Institut Jülich OPUS4-9653 Konferenzveröffentlichung Sattler, Johannes Christoph, ; Chico Caminos, Ricardo Alexander, ; Atti, Vikrama Nagababu, vikrama.atti@sij.fh-aachen.de; Ürlings, Nicolas, ; Dutta, Siddharth, ; Ruiz, Victor, ; Kalogirou, Soteris, ; Ktistis, Panayiotis, ; Agathokleous, Rafaela, ; Alexopoulos, Spiros, alexopoulos@fh-aachen.de; Teixeira Boura, Cristiano José, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Dynamic simulation tool for a performance evaluation and sensitivity study of a parabolic trough collector system with concrete thermal energy storage Melville, NY American Institute of Physics 2020 6 Seiten AIP Conference Proceedings 2303 160004 10.1063/5.0029277 weltweit https://doi.org/10.1063/5.0029277 Solar-Institut Jülich OPUS4-6983 Konferenzveröffentlichung Kronhardt, Valentina, kronhardt@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Reißel, Martin, reissel@fh-aachen.de; Latzke, Markus, latzke@sij.fh-aachen.de; Rendon, C., ; Sattler, Johannes, Christoph, sattler@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Simulation of operational management for the Solar Thermal Test and Demonstration Power Plant Jülich using optimized control strategies of the storage system 2015 5 Energy procedia 1 6 Solar-Institut Jülich OPUS4-8752 Konferenzveröffentlichung Rendon, Carlos, ; Dieckmann, Simon, ; Weidle, Mathias, ; Dersch, Jürgen, ; Teixeira Boura, Cristiano José, ; Polklas, Thomas, ; Kuschel, Marcus, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Retrofitting of existing parabolic trough collector power plants with molten salt tower systems 2018 NaN AIP Conference Proceedings 2033 1 030014-1 030014-8 10.1063/1.5067030 https://doi.org/10.1063/1.5067030 Solar-Institut Jülich OPUS4-9101 Konferenzveröffentlichung Sattler, Johannes, Christoph, sattler@sij.fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Caminos, Ricardo Alexander Chico, chico-caminos@sij.fh-aachen.de; Mitchell, John C., ; Ruiz, Victor C., ; Kalogirou, Soteris, ; Ktistis, Panayiotis K., ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Dynamic simulation model of a parabolic trough collector system with concrete thermal energy storage for process steam generation 2019 NaN AIP Conference Proceedings 2126 150007-1 150007-8 10.1063/1.5117663 weltweit https://doi.org/10.1063/1.5117663 Fachbereich Energietechnik OPUS4-9100 Konferenzveröffentlichung May, Martin, may@sij.fh-aachen.de; Breitbach, Gerd, breitbach@fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Latzke, Markus, latzke@sij.fh-aachen.de; Bäumer, Klaus, baeumer@sij.fh-aachen.de; Uhlig, Ralf, ; Söhn, Matthias, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Experimental facility for investigations of wire mesh absorbers for pressurized gases 2019 NaN AIP Conference Proceedings 2126 030035-1 030035-9 10.1063/1.5117547 weltweit https://doi.org/10.1063/1.5117547 Fachbereich Energietechnik OPUS4-9098 Konferenzveröffentlichung Breitbach, Gerd, breitbach@fh-aachen.de; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; May, Martin, may@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Analysis of volumetric solar radiation absorbers made of wire meshes 2019 NaN AIP Conference Proceedings 2126 030009-1 030009-6 10.1063/1.5117521 weltweit https://doi.org/10.1063/1.5117521 Fachbereich Energietechnik OPUS4-9487 Konferenzveröffentlichung Sattler, Johannes, Christoph, sattler@sij.fh-aachen.de; Caminos, Ricardo Alexander Chico, ; Ürlings, Nicolas, ; Dutta, Siddharth, ; Ruiz, Victor, ; Kalogirou, Soteris, ; Ktistis, Panayiotis, ; Agathokleous, Rafaela, ; Jung, Christian, ; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Atti, Vikrama Nagababu, vikrama.atti@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Operational experience and behaviour of a parabolic trough collector system with concrete thermal energy storage for process steam generation in Cyprus 2020 NaN AIP Conference Proceedings 2303 140004-1 140004-10 10.1063/5.0029278 campus https://doi.org/10.1063/5.0029278 Fachbereich Energietechnik OPUS4-8749 Konferenzveröffentlichung Teixeira Boura, Cristiano José, ; Niederwestberg, Stefan, ; McLeod, Jacqueline, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Hoffschmidt, Bernhard, hoffschmidt@sij.fh-aachen.de Development of heat exchanger for high temperature energy storage with bulk materials 2016 NaN AIP Conference Proceedings 1734 1 050008-1 050008-7 10.1063/1.4949106 https://doi.org/10.1063/1.4949106 Solar-Institut Jülich OPUS4-8989 Konferenzveröffentlichung Schwager, Christian, schwager@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Flesch, Robert, ; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Herrmann, Ulf, ulf.hermann@sij.fh-aachen.de Improved efficiency prediction of a molten salt receiver based on dynamic cloud passage simulation 2019 NaN AIP Conference Proceedings 2126 978-0-7354-1866-0 1 030054-1 030054-8 10.1063/1.5117566 campus https://doi.org/10.1063/1.5117566 Solar-Institut Jülich OPUS4-9099 Konferenzveröffentlichung Mahdi, Zahra, mahdi@sij.fh-aachen.de; Rendón, Carlos, rendon@sij.fh-aachen.de; Schwager, Christian, schwager@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Novel concept for indirect solar-heated methane reforming Melville, NY AIP Publishing 2019 NaN AIP Conference Proceedings 2126 180014-1 180014-7 10.1063/1.5117694 weltweit https://doi.org/10.1063/1.5117694 Fachbereich Energietechnik OPUS4-11063 Konferenzveröffentlichung Sattler, Johannes Christoph, sattler@sij.fh-aachen.de; Atti, Vikrama, ; Alexopoulos, Spiros, alexopoulos@sij.fh-aachen.de; Teixeira Boura, Cristiano José, Boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Dutta, Siddharth, ; Kioutsioukis, Ioannis, DNI forecast tool for the smart operation of a parabolic trough collector system with concrete thermal energy storage: Theory, results and outlook This work presents a basic forecast tool for predicting direct normal irradiance (DNI) in hourly resolution, which the Solar-Institut Jülich (SIJ) is developing within a research project. The DNI forecast data shall be used for a parabolic trough collector (PTC) system with a concrete thermal energy storage (C-TES) located at the company KEAN Soft Drinks Ltd in Limassol, Cyprus. On a daily basis, 24-hour DNI prediction data in hourly resolution shall be automatically produced using free or very low-cost weather forecast data as input. The purpose of the DNI forecast tool is to automatically transfer the DNI forecast data on a daily basis to a main control unit (MCU). The MCU automatically makes a smart decision on the operation mode of the PTC system such as steam production mode and/or C-TES charging mode. The DNI forecast tool was evaluated using historical data of measured DNI from an on-site weather station, which was compared to the DNI forecast data. The DNI forecast tool was tested using data from 56 days between January and March 2022, which included days with a strong variation in DNI due to cloud passages. For the evaluation of the DNI forecast reliability, three categories were created and the forecast data was sorted accordingly. The result was that the DNI forecast tool has a reliability of 71.4 % based on the tested days. The result fulfils SIJ's aim to achieve a reliability of around 70 %, but SIJ aims to still improve the DNI forecast quality. Hannover TIB Open Publishing 2022 9 Seiten SolarPACES conference proceedings 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA VOL. 1 10.52825/solarpaces.v1i.731 https://doi.org/10.52825/solarpaces.v1i.731 Fachbereich Energietechnik OPUS4-11062 Konferenzveröffentlichung Sattler, Johannes Christoph, sattler@sij.fh-aachen.de; Schneider, Iesse Peer, ; Angele, Florian, ; Atti, Vikrama, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Development of heliostat field calibration methods: Theory and experimental test results In this work, three patent pending calibration methods for heliostat fields of central receiver systems (CRS) developed by the Solar-Institut Jülich (SIJ) of the FH Aachen University of Applied Sciences are presented. The calibration methods can either operate in a combined mode or in stand-alone mode. The first calibration method, method A, foresees that a camera matrix is placed into the receiver plane where it is subjected to concentrated solar irradiance during a measurement process. The second calibration method, method B, uses an unmanned aerial vehicle (UAV) such as a quadrocopter to automatically fly into the reflected solar irradiance cross-section of one or more heliostats (two variants of method B were tested). The third calibration method, method C, foresees a stereo central camera or multiple stereo cameras installed e.g. on the solar tower whereby the orientations of the heliostats are calculated from the location detection of spherical red markers attached to the heliostats. The most accurate method is method A which has a mean accuracy of 0.17 mrad. The mean accuracy of method B variant 1 is 1.36 mrad and of variant 2 is 1.73 mrad. Method C has a mean accuracy of 15.07 mrad. For method B there is great potential regarding improving the measurement accuracy. For method C the collected data was not sufficient for determining whether or not there is potential for improving the accuracy. Hannover TIB Open Publishing 2022 9 Seiten SolarPACES conference proceedings 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA Vol. 1 10.52825/solarpaces.v1i.678 https://doi.org/10.52825/solarpaces.v1i.678 Fachbereich Energietechnik OPUS4-11069 Konferenzveröffentlichung Lahrs, Lennart, ; Krisam, Pierre, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Envisioning a collaborative energy system planning platform for the energy transition at the district level Residential and commercial buildings account for more than one-third of global energy-related greenhouse gas emissions. Integrated multi-energy systems at the district level are a promising way to reduce greenhouse gas emissions by exploiting economies of scale and synergies between energy sources. Planning district energy systems comes with many challenges in an ever-changing environment. Computational modelling established itself as the state-of-the-art method for district energy system planning. Unfortunately, it is still cumbersome to combine standalone models to generate insights that surpass their original purpose. Ideally, planning processes could be solved by using modular tools that easily incorporate the variety of competing and complementing computational models. Our contribution is a vision for a collaborative development and application platform for multi-energy system planning tools at the district level. We present challenges of district energy system planning identified in the literature and evaluate whether this platform can help to overcome these challenges. Further, we propose a toolkit that represents the core technical elements of the platform. Lastly, we discuss community management and its relevance for the success of projects with collaboration and knowledge sharing at their core. Procedings of ECOS 2023 2023 7 The 36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 25-30 JUNE, 2023, Las Palmas de Gran Canaria, Spain 3163 3170 10.52202/069564-0284 https://doi.org/10.52202/069564-0284 Fachbereich Energietechnik OPUS4-11066 Konferenzveröffentlichung Schwager, Christian, ; Angele, Florian, ; Nouri, Bijan, ; Schwarzbözl, Peter, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Impact of DNI forecast quality on performance prediction for a commercial scale solar tower: Application of nowcasting DNI maps to dynamic solar tower simulation Concerning current efforts to improve operational efficiency and to lower overall costs of concentrating solar power (CSP) plants with prediction-based algorithms, this study investigates the quality and uncertainty of nowcasting data regarding the implications for process predictions. DNI (direct normal irradiation) maps from an all-sky imager-based nowcasting system are applied to a dynamic prediction model coupled with ray tracing. The results underline the need for high-resolution DNI maps in order to predict net yield and receiver outlet temperature realistically. Furthermore, based on a statistical uncertainty analysis, a correlation is developed, which allows for predicting the uncertainty of the net power prediction based on the corresponding DNI forecast uncertainty. However, the study reveals significant prediction errors and the demand for further improvement in the accuracy at which local shadings are forecasted. Hannover TIB Open Publishing 2022 9 Seiten SolarPACES conference proceedings 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA Vol. 1 10.52825/solarpaces.v1i.675 https://doi.org/10.52825/solarpaces.v1i.675 Fachbereich Energietechnik OPUS4-11067 Konferenzveröffentlichung Schulte, Jonas, j.schulte@sij.fh-aachen.de; Schwager, Christian, ; Frantz, Cathy, ; Schloms, Felix, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Control concept for a molten salt receiver in star design: Development, optimization and testing with cloud passage scenarios A promising approach to reduce the system costs of molten salt solar receivers is to enable the irradiation of the absorber tubes on both sides. The star design is an innovative receiver design, pursuing this approach. The unconventional design leads to new challenges in controlling the system. This paper presents a control concept for a molten salt receiver system in star design. The control parameters are optimized in a defined test cycle by minimizing a cost function. The control concept is tested in realistic cloud passage scenarios based on real weather data. During these tests, the control system showed no sign of unstable behavior, but to perform sufficiently in every scenario further research and development like integrating Model Predictive Controls (MPCs) need to be done. The presented concept is a starting point to do so. Hannover TIB Open Publishing 2022 9 Seiten SolarPACES conference proceedings 28th International Conference on Concentrating Solar Power and Chemical Energy Systems, 27-30 September, Albuquerque, NM, USA Vol. 1 10.52825/solarpaces.v1i.693 https://doi.org/10.52825/solarpaces.v1i.693 Fachbereich Energietechnik OPUS4-11079 Konferenzveröffentlichung Gedle, Yibekal, ; Schmitz, Mark, ; Gielen, Hans, ; Schmitz, Pascal, schmitz@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Mahdi, Zahra, mahdi@sij.fh-aachen.de; Caminos, Ricardo Alexander Chico, ; Dersch, Jürgen, Analysis of an integrated CSP-PV hybrid power plant In the past, CSP and PV have been seen as competing technologies. Despite massive reductions in the electricity generation costs of CSP plants, PV power generation is - at least during sunshine hours - significantly cheaper. If electricity is required not only during the daytime, but around the clock, CSP with its inherent thermal energy storage gets an advantage in terms of LEC. There are a few examples of projects in which CSP plants and PV plants have been co-located, meaning that they feed into the same grid connection point and ideally optimize their operation strategy to yield an overall benefit. In the past eight years, TSK Flagsol has developed a plant concept, which merges both solar technologies into one highly Integrated CSP-PV-Hybrid (ICPH) power plant. Here, unlike in simply co-located concepts, as analyzed e.g. in [1] - [4], excess PV power that would have to be dumped is used in electric molten salt heaters to increase the storage temperature, improving storage and conversion efficiency. The authors demonstrate the electricity cost sensitivity to subsystem sizing for various market scenarios, and compare the resulting optimized ICPH plants with co-located hybrid plants. Independent of the three feed-in tariffs that have been assumed, the ICPH plant shows an electricity cost advantage of almost 20% while maintaining a high degree of flexibility in power dispatch as it is characteristic for CSP power plants. As all components of such an innovative concept are well proven, the system is ready for commercial market implementation. A first project is already contracted and in early engineering execution. Melville, NY AIP conference proceedings / American Institute of Physics 2022 9 Seiten SolarPACES 2020 978-0-7354-4195-8 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September-2 October 2020 Freiburg, Germany 2445 / 1 10.1063/5.0086236 https://doi.org/10.1063/5.0086236 Fachbereich Energietechnik OPUS4-11080 Konferenzveröffentlichung Mahdi, Zahra, ; Dersch, Jürgen, ; Schmitz, Pascal, schmitz@sij.fh-aachen.de; Dieckmann, Simon, ; Caminos, Ricardo Alexander Chico, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Schwager, Christian, ; Schmitz, Mark, ; Gielen, Hans, ; Gedle, Yibekal, ; Büscher, Rauno, Technical assessment of Brayton cycle heat pumps for the integration in hybrid PV-CSP power plants The hybridization of Concentrated Solar Power (CSP) and Photovoltaics (PV) systems is a promising approach to reduce costs of solar power plants, while increasing dispatchability and flexibility of power generation. High temperature heat pumps (HT HP) can be utilized to boost the salt temperature in the thermal energy storage (TES) of a Parabolic Trough Collector (PTC) system from 385 °C up to 565 °C. A PV field can supply the power for the HT HP, thus effectively storing the PV power as thermal energy. Besides cost-efficiently storing energy from the PV field, the power block efficiency of the overall system is improved due to the higher steam parameters. This paper presents a technical assessment of Brayton cycle heat pumps to be integrated in hybrid PV-CSP power plants. As a first step, a theoretical analysis was carried out to find the most suitable working fluid. The analysis included the fluids Air, Argon (Ar), Nitrogen (N2) and Carbon dioxide (CO2). N2 has been chosen as the optimal working fluid for the system. After the selection of the ideal working medium, different concepts for the arrangement of a HT HP in a PV-CSP hybrid power plant were developed and simulated in EBSILON®Professional. The concepts were evaluated technically by comparing the number of components required, pressure losses and coefficient of performance (COP). Melville, NY AIP conference proceedings / American Institute of Physics 2022 11 Seiten SOLARPACES 2020 978-0-7354-4195-8 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September-2 October 2020 Freiburg, Germany 2445 / 1 10.1063/5.0086269 https://doi.org/10.1063/5.0086269 Fachbereich Energietechnik OPUS4-11078 Wissenschaftlicher Artikel Schwager, Christian, ; Flesch, Robert, ; Schwarzbözl, Peter, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de Advanced two phase flow model for transient molten salt receiver system simulation In order to realistically predict and optimize the actual performance of a concentrating solar power (CSP) plant sophisticated simulation models and methods are required. This paper presents a detailed dynamic simulation model for a Molten Salt Solar Tower (MST) system, which is capable of simulating transient operation including detailed startup and shutdown procedures including drainage and refill. For appropriate representation of the transient behavior of the receiver as well as replication of local bulk and surface temperatures a discretized receiver model based on a novel homogeneous two-phase (2P) flow modelling approach is implemented in Modelica Dymola®. This allows for reasonable representation of the very different hydraulic and thermal properties of molten salt versus air as well as the transition between both. This dynamic 2P receiver model is embedded in a comprehensive one-dimensional model of a commercial scale MST system and coupled with a transient receiver flux density distribution from raytracing based heliostat field simulation. This enables for detailed process prediction with reasonable computational effort, while providing data such as local salt film and wall temperatures, realistic control behavior as well as net performance of the overall system. Besides a model description, this paper presents some results of a validation as well as the simulation of a complete startup procedure. Finally, a study on numerical simulation performance and grid dependencies is presented and discussed. Amsterdam Elsevier 2022 13 Solar Energy 232 362 375 10.1016/j.solener.2021.12.065 https://doi.org/10.1016/j.solener.2021.12.065 Fachbereich Energietechnik OPUS4-11076 Konferenzveröffentlichung Schulte, Jonas, j.schulte@sij.fh-aachen.de; Schwager, Christian, ; Noureldin, Kareem, ; May, Martin, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Gradient controlled startup procedure of a molten-salt power-to-heat energy storage plant based on dynamic process simulation The integration of high temperature thermal energy storages into existing conventional power plants can help to reduce the CO2 emissions of those plants and lead to lower capital expenditures for building energy storage systems, due to the use of synergy effects [1]. One possibility to implement that, is a molten salt storage system with a powerful power-to-heat unit. This paper presents two possible control concepts for the startup of the charging system of such a facility. The procedures are implemented in a detailed dynamic process model. The performance and safety regarding the film temperatures at heat transmitting surfaces are investigated in the process simulations. To improve the accuracy in predicting the film temperatures, CFD simulations of the electrical heater are carried out and the results are merged with the dynamic model. The results show that both investigated control concepts are safe regarding the temperature limits. The gradient controlled startup performed better than the temperature-controlled startup. Nevertheless, there are several uncertainties that need to be investigated further. Melville, NY AIP conference proceedings / American Institute of Physics 2023 9 Seiten SolarPACES: Solar Power & Chemical Energy Systems 978-0-7354-4623-6 27th International Conference on Concentrating Solar Power and Chemical Energy Systems 27 September-1 October 2021 Online 2815 / 1 10.1063/5.0148741 https://doi.org/10.1063/5.0148741 Fachbereich Energietechnik OPUS4-11077 Konferenzveröffentlichung Schwager, Christian, ; Angele, Florian, ; Schwarzbözl, Peter, ; Teixeira Boura, Cristiano José, Boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Model predictive assistance for operational decision making in molten salt receiver systems Despite the challenges of pioneering molten salt towers (MST), it remains the leading technology in central receiver power plants today, thanks to cost effective storage integration and high cost reduction potential. The limited controllability in volatile solar conditions can cause significant losses, which are difficult to estimate without comprehensive modeling [1]. This paper presents a Methodology to generate predictions of the dynamic behavior of the receiver system as part of an operating assistance system (OAS). Based on this, it delivers proposals if and when to drain and refill the receiver during a cloudy period in order maximize the net yield and quantifies the amount of net electricity gained by this. After prior analysis with a detailed dynamic two-phase model of the entire receiver system, two different reduced modeling approaches where developed and implemented in the OAS. A tailored decision algorithm utilizes both models to deliver the desired predictions efficiently and with appropriate accuracy. Melville, NY AIP conference proceedings / American Institute of Physics 2023 8 Seiten SolarPACES: Solar Power & Chemical Energy Systems 978-0-7354-4623-6 27th International Conference on Concentrating Solar Power and Chemical Energy Systems 27 September-1 October 2021 Online 2815 / 1 10.1063/5.0151514 https://doi.org/10.1063/5.0151514 Fachbereich Energietechnik OPUS4-9488 Konferenzveröffentlichung Rendon, Carlos, ; Schwager, Christian, schwager@sij.fh-aachen.de; Ghiasi, Mona, ; Schmitz, Pascal, schmitz@sij.fh-aachen.de; Bohang, Fakhri, ; Caminos, Ricardo Alexander Chico, chico-camino@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Modeling and upscaling of a pilot bayonettube reactor for indirect solar mixed methane reforming 2020 NaN AIP Conference Proceedings 2303 170012-1 170012-9 10.1063/5.0029974 campus https://doi.org/10.1063/5.0029974 Fachbereich Energietechnik OPUS4-11084 Konferenzveröffentlichung Zahra, Mahdi, ; Phani Srujan, Merige, ; Caminos, Ricardo Alexander Chico, ; Schmitz, Pascal, schmitz@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Schmitz, Mark, ; Gielen, Hans, ; Gedle, Yibekal, ; Dersch, Jürgen, Modeling the thermal behavior of solar salt in electrical resistance heaters for the application in PV-CSP hybrid power plants Concentrated Solar Power (CSP) systems are able to store energy cost-effectively in their integrated thermal energy storage (TES). By intelligently combining Photovoltaics (PV) systems with CSP, a further cost reduction of solar power plants is expected, as well as an increase in dispatchability and flexibility of power generation. PV-powered Resistance Heaters (RH) can be deployed to raise the temperature of the molten salt hot storage from 385 °C up to 565 °C in a Parabolic Trough Collector (PTC) plant. To avoid freezing and decomposition of molten salt, the temperature distribution in the electrical resistance heater is investigated in the present study. For this purpose, a RH has been modeled and CFD simulations have been performed. The simulation results show that the hottest regions occur on the electric rod surface behind the last baffle. A technical optimization was performed by adjusting three parameters: Shell-baffle clearance, electric rod-baffle clearance and number of baffles. After the technical optimization was carried out, the temperature difference between the maximum temperature and the average outlet temperature of the salt is within the acceptable limits, thus critical salt decomposition has been avoided. Additionally, the CFD simulations results were analyzed and compared with results obtained with a one-dimensional model in Modelica. Melville, NY AIP conference proceedings / American Institute of Physics 2022 9 Seiten SOLARPACES 2020 978-0-7354-4195-8 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September-2 October 2020 Freiburg, Germany 2445 / 1 10.1063/5.0086268 https://doi.org/10.1063/5.0086268 Fachbereich Energietechnik OPUS4-11085 Konferenzveröffentlichung Caminos, Ricardo Alexander Chico, ; Schmitz, Pascal, schmitz@sij.fh-aachen.de; Atti, Vikrama, ; Mahdi, Zahra, ; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Sattler, Johannes Christoph, sattler@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; Hilger, Patrick, ; Dieckmann, Simon, Development of a micro heliostat and optical qualification assessment with a 3D laser scanning method The Solar-Institut Jülich (SIJ) and the companies Hilger GmbH and Heliokon GmbH from Germany have developed a small-scale cost-effective heliostat, called "micro heliostat". Micro heliostats can be deployed in small-scale concentrated solar power (CSP) plants to concentrate the sun's radiation for electricity generation, space or domestic water heating or industrial process heat. In contrast to conventional heliostats, the special feature of a micro heliostat is that it consists of dozens of parallel-moving, interconnected, rotatable mirror facets. The mirror facets array is fixed inside a box-shaped module and is protected from weathering and wind forces by a transparent glass cover. The choice of the building materials for the box, tracking mechanism and mirrors is largely dependent on the selected production process and the intended application of the micro heliostat. Special attention was paid to the material of the tracking mechanism as this has a direct influence on the accuracy of the micro heliostat. The choice of materials for the mirror support structure and the tracking mechanism is made in favor of plastic molded parts. A qualification assessment method has been developed by the SIJ in which a 3D laser scanner is used in combination with a coordinate measuring machine (CMM). For the validation of this assessment method, a single mirror facet was scanned and the slope deviation was computed. Melville, NY AIP conference proceedings / American Institute of Physics 2022 8 Seiten SOLARPACES 2020 978-0-7354-4195-8 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September-2 October 2020 Freiburg, Germany 2445 / 1 10.1063/5.0086262 https://doi.org/10.1063/5.0086262 Fachbereich Energietechnik OPUS4-11087 Konferenzveröffentlichung Neumann, Hannah, ; Adam, Mario, ; Backes, Klaus, ; Börner, Martin, ; Clees, Tanja, ; Doetsch, Christian, ; Glaeser, Susanne, ; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de; May, Johanna, ; Rosenthal, Florian, rosenthal@fh-aachen.de; Sauer, Dirk Uwe, ; Stadler, Ingo, Development of open educational resources for renewable energy and the energy transition process The dissemination of knowledge about renewable energies is understood as a social task with the highest topicality. The transfer of teaching content on renewable energies into digital open educational resources offers the opportunity to significantly accelerate the implementation of the energy transition. Thus, in the here presented project six German universities create open educational resources for the energy transition. These materials are available to the public on the internet under a free license. So far there has been no publicly accessible, editable media that cover entire learning units about renewable energies extensively and in high technical quality. Thus, in this project, the content that remains up-to-date for a longer period is appropriately prepared in terms of media didactics. The materials enable lecturers to provide students with in-depth training about technologies for the energy transition. In a particular way, the created material is also suitable for making the general public knowledgeable about the energy transition with scientifically based material. Freiburg International Solar Energy Society 2021 6 Seiten ISES SWC 2021 ISES Solar World Congress, virtual conference 25-29 October 2021 10.18086/swc.2021.47.03 https://doi.org/10.18086/swc.2021.47.03 Fachbereich Energietechnik OPUS4-11086 Konferenzveröffentlichung Niederwestberg, Stefan, ; Schneider, Falko, f.schneider@sij.fh-aachen.de; Teixeira Boura, Cristiano José, boura@sij.fh-aachen.de; Herrmann, Ulf, ulf.herrmann@sij.fh-aachen.de Introduction to a direct irradiated transparent tube particle receiver New materials often lead to innovations and advantages in technical applications. This also applies to the particle receiver proposed in this work that deploys high-temperature and scratch resistant transparent ceramics. With this receiver design, particles are heated through direct-contact concentrated solar irradiance while flowing downwards through tubular transparent ceramics from top to bottom. In this paper, the developed particle receiver as well as advantages and disadvantages are described. Investigations on the particle heat-up characteristics from solar irradiance were carried out with DEM simulations which indicate that particle temperatures can reach up to 1200 K. Additionally, a simulation model was set up for investigating the dynamic behavior. A test receiver at laboratory scale has been designed and is currently being built. In upcoming tests, the receiver test rig will be used to validate the simulation results. The design and the measurement equipment is described in this work. Melville, NY AIP conference proceedings / American Institute of Physics 2022 9 Seiten SOLARPACES 2020 978-0-7354-4195-8 26th International Conference on Concentrating Solar Power and Chemical Energy Systems 28 September-2 October 2020 Freiburg, Germany 2445 / 1 10.1063/5.0086735 https://doi.org/10.1063/5.0086735 Fachbereich Energietechnik